Most of us would like to believe we're smart enough not to open an email attachment that's advertised as a nude photo. But enough people will still bite when this ancient social engineering trick hits their inboxes, so the bad guys keep 'em coming. This morning, my friend Graham Cluley at Sophos is warning of a new nudie trick.\tIn the Sophos Naked Security blog, Cluley writes of a malware-laced file advertised as nude photos of girlfriends and the like. He says, "Computer users are being warned to be wary of email messages which suggest they contain nude photographs of girlfriends, or claim that they have been reported to the police, as the attached file (Photo.zip) really contains a Trojan horse."\tHe says the bad guys are using the following subject\u00a0 lines in these emails:\t\t\t\t\t\tThese pictures should be taken down immediately.\t\t\t\t\tYou can't say I haven't warned you now enjoy the consequences.\t\t\t\t\tThe police investigation is under way now. You'll be really sorry about what you have done.\t\t\t\t\tThe criminal investigation agains you has started. Grave privacy violation is a serious thing.\t\tHere's another example:\t\t\tSubject:\u00a0Lets put this behind us once and for all I know you broke into my email.\t\t\tMessage body:\u00a0Hate to bother you \t\t\tI have a proof that you broke into my email and stole my private photos and financial information. It can be clearly seen in the files attached to this message. If you don't respond within 48 hours I will have to report you.\tAnd another:\t\t\tSubject:\u00a0How can you be so cruel to me? I'll have to react and destroy you.\t\t\tMessage body:\u00a0Hate to bother you \t\t\tThis is quite crazy but someone sent me a nude picture of your girlfriend. Is seems to be her in attachent right? We'll have to track down the bastard who do it I can help you!\t"You can just imagine how some folks would react if they received one of these emails," Cluley writes. "Many would probably open the attachment - either out of curiosity or concern - and could end up having their Windows computer infected as a result. Please remember to\u00a0always\u00a0be suspicious of unsolicited emails, and keep your security software updated."\tAs someone who recently fell for such a scheme -- in my case it was a tweet about someone saying bad things about me online -- I would advise you to heed Cluley's words.